Australian Energy Market Operator

AEMO operates Australia's National Electricity Market (NEM), the interconnected power system in Australia’s eastern and south-eastern seaboard, and the Wholesale Electricity Market (WEM) and power system in Western Australia.

AEMO operates gas retail markets in New South Wales and the Australian Capital Territory, Queensland, South Australia, Victoria, and Western Australia. AEMO also operates wholesale gas markets in south-eastern Australia, those being the Declared Wholesale Gas Market in Victoria (DWGM), the Short Term Trading Market in Adelaide, Brisbane and Sydney (STTM), and the Gas Supply Hub (GSH), whose trading locations are based at Wallumbilla in Queensland, and Moomba in South Australia. AEMO also operates the Natural Gas Services Bulletin Board (GBB), and is system operator of the Victorian Gas Declared Transmission System. AEMO is also responsible for Gas Services Information functions in Western Australia.

The planned outage of Hazelwood - Loy Yang PS 3 500kV LINE in the VIC region has been extended to 1800 hrs 24/05/2018. The power system will be operated in a secure operating state during this outage.

Following a contingency event AEMO has determined the forecast Victorian demand will be 200 MW in excess of the maximum supportable demand.If the contingent event occurs up to 200 MW may have to be load shed to return to secure operating state .

The following constraint set is invoked from 1410 hrs, see Network Outage Schedule (NOS) for further detailsN-X_VPSN_ERTXThe constraint set contains equations with the following interconnectors on the LHS.NSW1-QLD1N-Q-MNSP1VIC1-NSW1

The AEMO Intervention Event and all associated directions are cancelled from 1400 hrs 24/05/18

Manager NEM Real Time Operations

6293024 May 2018 13:39GENERAL NOTICE

Planned frequency tests in Tasmania on 24/05/2018

AEMO ELECTRICITY MARKET NOTICEFrequency tests in Tasmania have been arranged between AEMO and relevant participants.Testing involves making selective changes to AEMO's AGC control system, and to some of generating units' governors controls in Tasmania to measure the effect on Tasmanian frequency control under normal operating conditions.Scheduled time of the test is between 1100 hrs - 1500 hrs on 24/05/2018Market Participants in mainland regions will not be affected by the tests.

Manager NEM Real Time Operations

6293124 May 2018 13:18MARKET SYSTEMS

INC0034601: Gas FRC Hub experienced degradation of service

MARKET NOTICE

Dear Users,

Please be aware of Incident and its status mentioned below:Gas FRC Hub experienced degradation of service

Services AffectedGas FRC Hub

Time of Occurrence of Incident24/05/2018 12:27:07 AEST

Impact/Status/RequirementsPlease note: The Gas FRC Hub experienced degradation of service between 22:40 23/05 - 01:30 24/05. During this time Business to Business transactions and transaction acknowledgements may have been delayed. Currently the service is fully operational with no reported backlog. If you have encountered a failed transaction then it will need to be resubmitted.

ReferencesIncident Number: INC0034601

For further details please contact the AEMO Information and Support Hub or on External 1300 236 600.

6292924 May 2018 7:22PRICES UNCHANGED

Prices for interval 24-May-2018 07:25 are now confirmed

AEMO ELECTRICITY MARKET NOTICE

Issued by Australian Energy Market Operator Ltd at 0722 hrs on 24 May 2018

PRICES ARE NOW CONFIRMED for dispatch interval 24-May-2018 07:25.

In accordance with Market Notice 62927 AEMO has reviewed this dispatch interval and determined that: - Manifestly Incorrect Inputs did not apply